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# This Makefile fragment (since dpkg 1.16.1) defines the following package
# information variables:
#
# DEB_SOURCE: source package name.
# DEB_VERSION: package's full version (epoch + upstream vers. + revision).
# DEB_VERSION_EPOCH_UPSTREAM: package's version without the Debian revision.
# DEB_VERSION_UPSTREAM_REVISION: package's version without the Debian epoch.
# DEB_VERSION_UPSTREAM: package's upstream version.
# DEB_DISTRIBUTION: distribution(s) listed in the current debian/changelog
# entry.
# DEB_TIMESTAMP: source package release date as seconds since the epoch as
# specified in the latest debian/changelog entry (since dpkg 1.22.9),
# although you are probably looking for SOURCE_DATE_EPOCH instead.
#
# SOURCE_DATE_EPOCH: source release date as seconds since the epoch, as
# specified by <https://reproducible-builds.org/specs/source-date-epoch/>
# (since dpkg 1.18.8).
# If it is undefined, the date of the latest changelog entry is used.
# In both cases, the value is exported.
ifndef dpkg_pkg_info_mk_included
dpkg_pkg_info_mk_included = yes
dpkg_parsechangelog_run = $(eval $(shell dpkg-parsechangelog | sed -n '\
s/^Distribution: \(.*\)/$$(eval DEB_DISTRIBUTION:=\1)/p;\
s/^Source: \(.*\)/$$(eval DEB_SOURCE:=\1)/p;\
s/^Version: \([0-9]*:\)\{0,1\}\([^-]*\)\(\(.*\)-[^-]*\)\{0,1\}$$/\
$$(eval DEB_VERSION:=\1\2\3)\
$$(eval DEB_VERSION_EPOCH_UPSTREAM:=\1\2\4)\
$$(eval DEB_VERSION_UPSTREAM_REVISION:=\2\3)\
$$(eval DEB_VERSION_UPSTREAM:=\2\4)/p;\
s/^Timestamp: \(.*\)/$$(eval DEB_TIMESTAMP:=\1)/p'))
# Compute all the values in one go.
$(dpkg_parsechangelog_run)
SOURCE_DATE_EPOCH ?= $(DEB_TIMESTAMP)
export SOURCE_DATE_EPOCH
endif # dpkg_pkg_info_mk_included
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